That is not what they did.
They detected emissions testing and reduced nitrous oxide emissions only during testing.
Breath in those particulates for a few years and ask how much harm it is doing.
Breath in those particulates for a few years and ask how much harm it is doing.
Taken together, that pair of statements looks rather odd if you know that Nitrous Oxide is not particulate.
And how was this done?
-- Breath in those particulates for a few years and ask how much harm it is doing. --
NOx particulates? LOL. at any rate, particulate emissions are lower now than they were in years gone by. I'm not going to assert they are for sure harmless, but dosage matters. Your body will die if it does not get arsenic, and it will die if it gets too much arsenic. I know arsenic and particulates are not the same thing, but dosage matters.
I operated heavy equipment for years—and years before the damned EPA was even a spurt in Nixon’s statist pants.
Particulate exhaust never harmed me, and by nature is not airborne long. Diesels are much more efficient than gasoline engines and thereby less polluting, but tyranny cares nothing for inconvenient facts.
Wrong wrong wrong
Nitrous oxide emissions are NOT particulates!
Nitrous Oxide is a vapor under ordinary atmospheric conditions.